Slipher, V.M., Spectrographic Equipment, 1933
Spectrographic Equipment of Lowell Observatory
Slipher, V.M., Band Spectra - Review of Literature, 1942
Band Spectra - Review of Literature Circa 1942
Slipher, V.M., Measurement & Reduction of Spectrographic Plates, 1905-1906
Measurement & Reduction of Spectrographic Plates, 1905-1906
Slipher, V.M., Spectrophotometer Data and Literature, 1905
Spectrophotometer Data and Literature, 1905
Slipher, V.M., Program for Spectrographic Observations of the Southern Stars, 1905
Program for Spectrographic Observations of the Southern Stars, 1905
Slipher, V.M., Spectral Curvature Measurements for the Curvature of Lines and the New Curved Slit, 1905
Spectral Curvature Measurements for the Curvature of Lines and the New Curved Slit, 1905
Slipher, V.M., Spectrographic References for Radial Velocity Measurements, Undated
Spectrographic References Radial Velocity Measurement. List of Plates.
Lowell, Percival, Mars at the Opposition, 1916-03-08 - 1916-03-30
Copy of Percival Lowell's items in the Lowell Observatory Observation Circular
Lowell, Percival, Venus in the Light of Recent Discoveries, 1897-03
Copy of Percival Lowell's article in the Atlantic Monthly
Lowell, Percival, "The Rotation Period of Venus", 1897-02-20
Copy of Percival Lowell's article in Astronomische Nachrichten
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